{"id":"GHSA-j3jw-j2j8-2wv9","summary":"Improper Verification of Cryptographic Signature in starkbank-ecdsa","details":"The verify function in the Stark Bank .NET ECDSA library (ecdsa-dotnet) 1.3.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.","aliases":["CVE-2021-43569"],"modified":"2024-02-17T05:34:44.265885Z","published":"2021-11-10T20:58:03Z","database_specific":{"cwe_ids":["CWE-347"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2021-11-10T18:26:13Z","nvd_published_at":"2021-11-09T22:15:00Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43569"},{"type":"PACKAGE","url":"https://github.com/starkbank/ecdsa-dotnet"},{"type":"WEB","url":"https://github.com/starkbank/ecdsa-dotnet/releases/tag/v1.3.2"},{"type":"WEB","url":"https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries"}],"affected":[{"package":{"name":"starkbank-ecdsa","ecosystem":"NuGet","purl":"pkg:nuget/starkbank-ecdsa"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.2"}]}],"versions":["0.0.1","1.0.0","1.1.0","1.2.0","1.2.1","1.3.0","1.3.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/11/GHSA-j3jw-j2j8-2wv9/GHSA-j3jw-j2j8-2wv9.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}